25
    • P018535
    • Twinned staurolite with garnet...
    • P018542
    • Oolitic limestone. Photomicrograph....
    • P018951
    • Gromerophyritic zoned plagioclase...
    • P018957
    • Foliated appinite with biotite and...
    • P018962
    • Non-foliated part of appinite....
    • P054595
    • Glomerophyric olivine in alkali basalt....
    • P054596
    • Glomerophyric olivine in alkali basalt....
    • P054617
    • Chalcedony. Photomicrograph. Light:...
    • P054621
    • Gabbro, clinopyroxene exsolution in...
    • P054623
    • Sapphire bearing basalt....
    • P054627
    • Ophimottled plagioclase-pyroxine phyric...
    • P054648
    • Tartan twinning in microcline granite....
    • P054657
    • Zoned andradite garnet....
    • P054690
    • Onyx. Photomicrograph. Light: PPL....
    • P054691
    • Onyx. Photomicrograph. Light: XPL....
    • P054692
    • Zeolites. Photomicrograph. Light: PPL....
    • P054693
    • Zeolites. Photomicrograph. Light: XPL....
    • P054697
    • Coral. Photomicrograph. Light: PPL....
    • P054710
    • Spherulitic texture. Photomicrograph....
    • P054721
    • Amphibolite. Photomicrograph. Light:...
    • P054753
    • Twinned and zoned Ti augute, essexite....
    • P054757
    • Euhedral diopside macrophenocryst,...
    • P054778
    • Skeletal plagioclase in pilotaxitic...
    • P054789
    • Foraminifera in a bioclastic limestone,...
    • P054791
    • Foraminifera in a bioclastic limestone,...